کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7785291 1500605 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Acetylation of bacterial cellulose catalyzed by citric acid: Use of reaction conditions for tailoring the esterification extent
ترجمه فارسی عنوان
استیلینگ سلولز باکتریایی کاتالیز شده با اسید سیتریک: استفاده از شرایط واکنش برای خرد کردن میزان استرینگ
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Bacterial cellulose (BC) nanoribbons were partially acetylated by a simple direct solvent-free route catalyzed by citric acid. The assay of reaction conditions within chosen intervals (i.e. esterification time (0.5-7 h), catalyst content (0.08-1.01 mmol/mmol AGU), and temperature (90-140 °C)), illustrated the flexibility of the methodology proposed, with reaction variables which can be conveniently manipulated to acetylate BC to the required degree of substitution (DS) within the 0.20-0.73 interval. Within this DS interval, characterization results indicated a surface-only process in which acetylated bacterial cellulose with tunable DS, preserved fibrous structure and increased hydrophobicity could be easily obtained. The feasibility of reusing the catalyst/excess acylant in view of potential scale-up was also illustrated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 153, 20 November 2016, Pages 686-695
نویسندگان
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